Leafpad does not add opened docs to recently-used.xbel

Created attachment 6375
screenshot of Recent Documents menu

tests, with some interesting results:
- right-click inside a folder in thunar. Pick "Create > Empty File".
- open the file in leafpad
- type something, and quit leafpad, saving the file.
- the file will NOT be found the Places > Recent Documents menu.

- copy a text file from another folder.
- open the copy. type something, and quit leafpad.
- the file will NOT be found the Places > Recent Documents menu.

- open leafpad from it's program launcher.
- type something.
- quit, saving the file.
- the file WILL be found the Places > Recent Documents menu.

the only one that gets listed in recently-used.xbel is the one created in leafpad, ie the only one in my test above that shows up in the recent documents menu.

$ ls -l ~/.local/share/recently-used.xbel
-rw------- 1 eggman eggman 14959 Jul 5 12:51 /home/eggman/.local/share/recently-used.xbel

leafpad 0.8.18.1-4
linux mint 17.1
xfce 4.12

Bug from conversation on this forum post: http://forum.xfce.org/viewtopic.php?pid=49096#p49096
Bug actually looks like it affects multiple programs, all of which may need to do something differently when files are opened in order for that action to be recognised by .local/share/recently-used.xbel
If anyone know what that is, that would be useful as per-program bugs could then be filed as appropriate.
Cheers.

Nemo and Caja actually do add an entry to recently-used.xbel, but Thunar, PCManFM and Nautilus do not.

Oddly, Nautilus adds the entry when using Open with other Application > Leafpad.

Leafpad does not support GtkRecentManager, and therefore it cannot manage recently used files. Nemo and Caja apparently handle things differently and update recently-used.xbel instead if the application is not able to:

  <bookmark:application name="nemo" exec="&apos;leafpad %f&apos;" modified="2018-10-22T12:14:03Z" count="1"/>
  <bookmark:application name="Mousepad" exec="&apos;mousepad %u&apos;" modified="2018-10-22T12:14:10Z" count="1"/>

In the third test case the entry is actually added by the "Save as" dialog window (GtkFileChooserDialog).

Mousepad works as expected, but it seems I can reproduce this misbehavior with Geany if the file was recently opened with it, not sure though.
I can't find any occurrences of "gtk_recent_manager_" in Thunar's source, so it never touches recently-used.xbel.
All in all, I don't know if it is responsibility of the file manager to handle this or if the application has the final word on it, say for instance due privacy reasons.